JPH0113243B2 - - Google Patents
Info
- Publication number
- JPH0113243B2 JPH0113243B2 JP54032245A JP3224579A JPH0113243B2 JP H0113243 B2 JPH0113243 B2 JP H0113243B2 JP 54032245 A JP54032245 A JP 54032245A JP 3224579 A JP3224579 A JP 3224579A JP H0113243 B2 JPH0113243 B2 JP H0113243B2
- Authority
- JP
- Japan
- Prior art keywords
- comb
- electrode
- shaped
- shaped electrode
- acoustic wave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000010897 surface acoustic wave method Methods 0.000 claims description 20
- 239000000758 substrate Substances 0.000 claims description 13
- 230000001902 propagating effect Effects 0.000 claims description 4
- 230000005284 excitation Effects 0.000 description 19
- 238000010586 diagram Methods 0.000 description 6
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910013641 LiNbO 3 Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/125—Driving means, e.g. electrodes, coils
- H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
- H03H9/14517—Means for weighting
- H03H9/1452—Means for weighting by finger overlap length, apodisation
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/02535—Details of surface acoustic wave devices
- H03H9/02818—Means for compensation or elimination of undesirable effects
- H03H9/02858—Means for compensation or elimination of undesirable effects of wave front distortion
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/02535—Details of surface acoustic wave devices
- H03H9/02818—Means for compensation or elimination of undesirable effects
- H03H9/02866—Means for compensation or elimination of undesirable effects of bulk wave excitation and reflections
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3224579A JPS55125713A (en) | 1979-03-22 | 1979-03-22 | Surface elastic wave device |
GB8009001A GB2047498B (en) | 1979-03-22 | 1980-03-17 | Elastic surface wave device |
US06/131,538 US4346322A (en) | 1979-03-22 | 1980-03-18 | Elastic surface wave device |
CA348,185A CA1129511A (en) | 1979-03-22 | 1980-03-21 | Elastic surface wave device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3224579A JPS55125713A (en) | 1979-03-22 | 1979-03-22 | Surface elastic wave device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55125713A JPS55125713A (en) | 1980-09-27 |
JPH0113243B2 true JPH0113243B2 (el) | 1989-03-06 |
Family
ID=12353605
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3224579A Granted JPS55125713A (en) | 1979-03-22 | 1979-03-22 | Surface elastic wave device |
Country Status (4)
Country | Link |
---|---|
US (1) | US4346322A (el) |
JP (1) | JPS55125713A (el) |
CA (1) | CA1129511A (el) |
GB (1) | GB2047498B (el) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5725714A (en) * | 1980-07-23 | 1982-02-10 | Oki Electric Ind Co Ltd | Elastic surface wave converter |
JPS5843609A (ja) * | 1981-09-09 | 1983-03-14 | Toshiba Corp | 弾性表面波装置 |
DE3208252A1 (de) * | 1982-03-08 | 1983-09-15 | Siemens AG, 1000 Berlin und 8000 München | Interdigitalwandler mit unterdrueckung reflektierter stoersignale |
US4535265A (en) * | 1984-05-17 | 1985-08-13 | Kabushiki Kaisha Toshiba | Surface acoustic wave transducer with internal acoustic reflection |
DE3517254A1 (de) * | 1985-05-13 | 1986-11-13 | Siemens AG, 1000 Berlin und 8000 München | Mit akustischen wellen arbeitendes elektrisches filter |
JPS6484909A (en) * | 1987-09-25 | 1989-03-30 | Nec Corp | Surface acoustic wave device |
JP3846409B2 (ja) * | 2002-02-15 | 2006-11-15 | 株式会社村田製作所 | 弾性表面波装置、通信装置 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3699364A (en) * | 1971-06-04 | 1972-10-17 | Hughes Aircraft Co | Acoustic surface wave device having improved transducer structure |
US3748603A (en) * | 1972-03-27 | 1973-07-24 | Zenith Radio Corp | Surface wave filter with reflection suppression |
US3908137A (en) * | 1973-12-26 | 1975-09-23 | Magnavox Co | Apparatus and method for triple transit signal cancellation in an acoustical surface wave device |
US3845418A (en) * | 1974-01-02 | 1974-10-29 | Hughes Aircraft Co | Acoustic surface wave device with reduced rf feedthrough |
US3952269A (en) * | 1975-04-28 | 1976-04-20 | Hughes Aircraft Company | Surface acoustic wave delay line |
FR2310029A1 (fr) * | 1975-04-30 | 1976-11-26 | Thomson Csf | Dispositif a ondes elastiques de surface permettant l'elimination des echos a transits multiples |
US4065789A (en) * | 1977-01-05 | 1977-12-27 | Zenith Radio Corporation | Surface wave device for use in a ghost cancellation system |
US4166257A (en) * | 1977-10-19 | 1979-08-28 | Motorola, Inc. | Capacitively weighted surface acoustic wave device |
-
1979
- 1979-03-22 JP JP3224579A patent/JPS55125713A/ja active Granted
-
1980
- 1980-03-17 GB GB8009001A patent/GB2047498B/en not_active Expired
- 1980-03-18 US US06/131,538 patent/US4346322A/en not_active Expired - Lifetime
- 1980-03-21 CA CA348,185A patent/CA1129511A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB2047498A (en) | 1980-11-26 |
US4346322A (en) | 1982-08-24 |
GB2047498B (en) | 1983-05-05 |
CA1129511A (en) | 1982-08-10 |
JPS55125713A (en) | 1980-09-27 |
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